Smrki plug construction



July 15, 1952 0rigina1 Filed oct. 1 1947 H. R FECHTER 2,603,200

SPARK PLUG CONSTRUCTION 4 Sheets-Sheet 1 July 15, 1952 H' R. FEICHTER 2,603,200

SPARK PLUG CONSTRUCTION ori ina1 Filed oct. 1 1947 4 Sheets-Sheet 2 the lower end of the we11, a' ground electrode adjacent the lower end of the insulator body, a body of Howable conducting n1aterial in the lower end of the we11, and an electrode rod in the well a d the lower end of the electrode rod extending into the body of owable conducting nlaterial, the

bottom wauof the We11having a Inicr0scopic hO1 formed therein by high tension electrical discharge.

17. In spark plug contrucion, an insulator body, the insulator body having fornled therein -wel1 with a 1 open upper end and the insulatbr body includin a botton1 wa11 extending across -he lower end of the we11, a ground electrode adjacent the lower end of the insulator body, a bod of i0wble conducting n1aterial in the 1ower end of the we11, and an electrode Tod in -20 the wel1 and the lowe' end' 0f the electrode rod extending 'into the bodyj of flowable condudtin n1aterial, and electrode n1ateria1 extending through the bottom wall of the well.

HAROLD R. E'EICHTER BEFERENOES CITED The fo110wing references are of rec0d in the 1le 0f'this patent;

UNIT'ED STATES PAT'ENTS 10 Number Name Date 1,27,975 Linn Nov 27 1917 1 315 298 Genn sept 9 1919 1,53,986 Natoli A r. 21, 1925 2,093 848 Randolph et al' Sept. 21 1937 2 162,062 Corbin June 13, 1939 2 171 929 Gazda Sept 5 1939 2,356,10 Tognola ^ug.15 19 2 379 635 I{astings, Jr July 3, 195

FOREIGN 1 TNTS Number Country Date 57,119 (...eat Britin Aug' 13, 192 

